Adjustable reamer.



Patented Dec. 7, 1909.

R. W. BAILEY. ADJUSTABLE BEAMER.

APPLICATION FILED NOV. 17, 1908.

. m uw. mw...

tinrr srnfrns rn RALPH W. BAILEY, OF HUDSON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF T0 WALTER H. SAWYER, OF LEWISTON, MAINE.

ADJUSTABLE BEAMER.

Specification of Letters Patent.

Patented Dec. 7, 1909.

Application filed November 17, 1908. Serial No. 463,122.

T 0 all whom 'it may concern:

Be it known that l, RALPH 1V. BAILEY, of Hudson, in the county of Middlesex and ttate of Massachusetts, have invented certain new and useful Improvements in Adjustable Beamers, of which the following is a specification.

This invention relates to reamers having substantially radial cutters and means for adjusting the same radially to vary the operative diameter of the reamer.

The invention has for its object to provide improved means for supporting and adjusting the cutters of a reamer of this character, and to provide an improved form of reamer blade or cutter adapted to be economically manufactured.

One object of the invention in particular is to enable the cutters to project to or beyond the outer end of the head of the reamer so that the reamer can out to the extreme inner end or bottom of a blind hole, and to provide an efficient lateral support for all portions of the cutters including` their projecting outer ends.

rllhe invention consists in the improvements which 1 will now proceed to describe and claim.

Of the accompanying drawings forming a part of this speciiication, Figure 1 represents a longitudinal section of a reamer embodying my invention. Figs. 2 and 3 represent longitudinal sections respectively of the supporting stud and the adjustable outer abutment hereinafter referred to. Fig. t represents a longitudinal section of the sleeve which radially adjusts, supports and confines the cutters. Fig. 5 represents a sec tion on line 5-5 of Fig. 1. Fig. 6 represents an end elevation of the shell which engages and laterally supports the outer ends of the cutters. Fig. 7 represents a section on line 7 -7 of Fig. 6. Fig. 8 represents a side elevation of one of the cutters.

The same reference characters indicate the same parts in all the figures.

In the drawings, 12 represents a supporting stud having an enlargement or shoulder 13 which constitutes a fixed inner abutment for the inner ends of the cutters hereinafter described. The outer end of the stud has an external screw thread 14.

15 represents an adjustable outer abutment for the outer ends of the cutters, said abutment having a conical inner face and an internally threaded shank 16, adapted to engage the external thread 14 on the stud, the abutment 15 being rotatable to adjust it toward and from the ixed abutment 13.

17 represents a sleeve which is fitted to slide lengthwise on the stud 12, and is prevented from rotatino` independently on said stud by a key 23 a xed to the stud and a longitudinal groove 24k in the sleeve engaged with said key. The sleeve 17 is provided with a series of longitudinal sockets 18 which are inclined relatively to the axis of the stud, and with substantially radial slots 19 which communicate with said sockets and extend through the periphery of the sleeve.

The cutters of the reamer are adapted to occupy the sockets 18 and slots 19, each cutter including an enlarged cylindrical back 21 having a sliding lit in the socket 13, and a wing 2O projecting from one side of the back 21 and adapted to occupy a slot 19, the sides of the wing being parallel with each other. The outer longitudinal edge of each wing 2O is inclined relatively to the back 21, the arrangement being such that, when the back 21 occupies the inclined socket 18, the outer edge of the wing 20, which constitutes the cutting edge, is substantially parallel with the axis of the stud 12, the width of the wings 2O being such that their cutting edges project outwardly from the periphery of the sleeve 17. The ends of the cutter backs 21 are shaped to conform to the inner faces of the abutments 13 and 15. The outer end of each cutter back is beveled at 22 to conform to the inclination of the conical inner face of the abutment 15. r1`he inner face of thefixed abutment 13 is preferably made slightly conical as shown in Figs. 1 and 2, the taper being considerably less than that of the inner face of the outer abutment 15, and the inner end of the cutter back being correspondingly beveled.

The sleeve 17 is shorter than the space leaving said ends unsupported. The abut ment 15 is then adjusted inwardly to compensate for the outward adjustment of the cutters and causes a firm bearing of the ends of the cutter backs on the two abutments. The inclination of the inner faces of the abutments and of the ends of the cutter backs, causes an automatic centering of the cutters by the adjustment of the outer abutment 15. Moreover, the pronounced inclination and conical form of the innerl face of the abutment 15 and the corresponding form of theouter ends of the cutter backs causes said abutment to prevent rotative movement of the cutter backs in their sockets, and compensate for any slight looseness of fit of the cutters in the slots inthe sleeve 17.

The outer end portions of the cutters project to a considerable eXtent from the outer end of the sleeve 17, and the outer ends of the wings 20 project beyond and overhang the outer ends of the backs 22, so that the cutting edges of the cutters extend across the outer abutment and to or beyond the outer end of the body of the reamer and are adapted to cut or ream to the extreme end or bottom of a blind hole, their outer ends being unobstructed as shown in Fig. 1.

To provide a lateral support for the por tions of the cutters that project from the sleeve 17, and thus prevent chattering or lateral vibration of said projecting portions, I provide a shell composed of a head 25 and a flange or body 26 adapted to overlap and have a sliding fit on the reduced outer' end of the periphery of the shell 17. The shell is provided with longitudinal slots 27 which coincide with the slots 19 in the sleeve and engage and firmly support the sides of the cutters. The said shell is secured to the outer abutment 15 by means of a set screw 28 engaging the center of the head 25 and a tapped orifice in the abutment 15. The said shell besides serving as a lateral support for the outer ends of the cutters also serves as a guard to prevent access of dirt etc., to the interior of the reamer.

The sleeve 17 and the shell 25, 26 collectively constitute a telescopic head which coperates with the abutments 13 and 15 in adjusting and confining the cutters. The sleeve 17 may be adjusted longitudinally by means of a bearing screw 30. The stud 12 may be provided with a shank 31 or other suitable means whereby it may be supported and operated. The sleeve 27 is provided with a rib 32 engaging a groove 33 in the inner surface of the shell to prevent rotative movement of the shell on the sleeve.

It will be seen that the sleeve 17 and the means for supporting it, constitute a carrier which engages and supports the inner end portions of the cutters, both radially and laterally, the outer end portions of the cutters projecting from said carrier, and that the shell constitutes an independent support connected with the carrier and adapted to laterally support the project-ing outer end portions of the cutters and prevent the same from chattering.

I believe myself to be the first to combine a carrier, a series of cutters and an independent lateral support for the outer ends of the cutters, and I therefore do not limit myself as to the specific construction of said parts.

I claim:

1. yAn adjustable reamer comprisingastud having an inner abutment and an outer abutment, one of said abutments being adjustable relatively to the other', a telescopic head having an inner member movable endwise on the stud between said abutments and an outer member secured to the adjustable abutment, said members having alined lon gitudinal slots, and a series of cutters supported laterally by said slots and longitudinally by said abutments, the cutters and the inner member of the head being provided with complemental means for radially adjusting, confining and supporting the cutters.`

2. An adjustable reamer comprisinga stud having an inner abutment and an outer abutment, one of said abutments being adjustable relatively to the other, a telescopic head having an inner member movable endwise on the stud between said abutments and an outer member secured to the adjustable abutment, said members having alined longitudinal slots, and a series of cutters supported laterally and longitudinally by said slots and abutments respectively, and eX- tended through the outer member of the head so that their outer ends are unobstructed, means being provided for radially adjusting, confining and supporting the cutters.

3. An adjustable reamer comprisinga sup-q porting stud having an inner abutment and an outer abutment, one of said abutments being adjustable relatively to the other, a series of cutters having thickened backs provided with inner and outer end faces seated on said abutments, and means between the abutments having provisions for radially adjusting, confining and supporting vthe cutters without longitudinal displacement thereof, the outer ends of the cutting edges of the cutters extending beyond the outer end faces of the backs, and across the outer abutment.

4. An adjustable reamer comprising'a supporting stud having an inner abutment and an outer abutment, one of said abutments being adjustable relatively to the other, a series of cutters having thickened backs which are inclined relatively to the cutting edges and have inner and outer end faces seated on said abut-ments, the outer ends of the cutting edges of the cutters extending beyond the outer end faces of the backs and across the outer abutment, and a sleeve longitudinally movable on the stud between the abutments and having inclined sockets engaged with the cutter backs, and slots engaged with the sides of the critters, a longitudinal movement of the sleeve causing a radial adjustment of the cutters without longitudinal displacement thereof.

5. An adjustable reamer comprising asupporting stud having an inner abutment and an outer abutment, one of said abutments being adjustable relatively to the other, a series of cutters having thickened backs which are inclined relatively to the cutting edges and have inner and outer end faces seated on said abutments, the outer ends of the cutting edges of the critters extending beyond the outer end faces of the backs and across the outer abutment, a sleeve movably mounted on the stud between the abutments and having inclined sockets engaged 'with the cutter backs and slots engaged with the sides of the cutters, and means for longitudinally adjusting said sleeve, a longitudinal movement of the sleeve causing a radial adjustment of the cutters without longitudinal displacement thereof.

6. An adjustable reamer comprising a supporting stud having an inner abutment and an outer abutment, one of said abutments being adjustable relatively to the other, a series of cutters having thickened backs which are inclined relatively to the cutting edges and have end faces seated on said abutments, a sleeve movably mounted on the stud between the abutments and having inclined sockets engaged with the cutter backs and slots engaged with the sides of the cutters, said sleeve constituting the inner member of a telescopic head, and an outer head member secured to the adjustable abutment and overlapping the inner member, said outer member having slots engaging the sides of the outer end portions of the cutters.

7. An adjustable reamer comprising a supporting stud having a fixed inner abutment, a screw-threaded outer' end and an adjustable outer abutment having a threaded shank engaging the thread on the stud, a sleeve movable endwise on the stud bet-Ween the abutments and confined against independent rotation, said sleeve having longitudinal inclined sockets and substantially radial slots communicating therewith, means for longitudinally adjusting the sleeve, and a series of cutters having thickened backs which are inclined relatively to the cutting edges and are engaged with said sockets and bear at their ends on said abutments, the cutters proj ecting through the slots and being laterally supported thereby, and having the outer ends of their cutting edges extended beyond the outer ends of the cutter backs and across the outer abut-ment, a longitudinal movement of the sleeve causing a radial adjustment of the cutters without longitudinal displacement thereof.

8. An adjustable reamer comprising a supporting stud having a fixed inner abutment and a screw-threaded outer end, and an adjustable outer abutment having a threaded shank engaging the thread on the stud, a sleeve movable endwise on the stud between the abutments and confined against independent rotation, said sleeve having longitudinal inclined sockets and substantially radial slots communicating therewith, a series of cutters having thickened backs which are inclined relatively to the cutting edges and are engaged with said sockets and bear at their ends on said abutments, the cutters projecting through the slots and being laterally supported thereby, said sleeve constituting the inner member of a telescopic head, and a shell having a bottom detachably secured to the outer abutment, and a flange overlapping the outer end of the sleeve and provided with cutter-engaging slots alined with the slots in the sleeve, said shell constituting the outer member of the telescopic head and serving both to laterally support the outer end portions of the cutters and also to exclude dirt from the interior of the reamer.

9. An adjustable reamer comprising a supporting stud having a fixed inner abutment and an adjustable outer abutment provided with a conical inner face, a series of cutters having enlarged backs, the ends of which are fitted to said abutments, and means between the abutments for radially adjusting, confining and supporting the cutters, said means including a Y sleeve longitudinally movable on the stud between said abutments, and having slots bearing on the sides of the cutters, the outer ends of the cutter backs being shaped to conform to the conical face of the outer abutment, whereby the said conical face is caused to compensate for looseness of fit of the cutters in the slots and prevent side movement of the cutters.

10. An adjustable reamer comprising a supporting stud having an inner abutment and an outer abutment each provided with a conical inner face, one of said abutments being adjustable relatively to the other, a series of cutters having enlarged backs, the ends of which are fitted to said abutments, and means between the abutments for radially adjusting, confining and supporting the cutters, said means including a sleeve longitudinally movable on the stud between said abutments, and having slots bearing on the sides of the cutters, the opposite ends of the cutter backs being shaped to conform to the conical faces of the abutments, whereby the said conical faces are caused to compensate for looseness of fit of the cutters in the slots and prevent side movement of the cutters.

l1. An adjustable reamer comprising a series of cutters, a carrier havingl adjustable means for engaging the cutters and supporting the same both radially and laterally at diferent distances from the axis of the carrier, and an independent support connected with said carrier and adapted to laterally support the outer end portions of the cutters in any position t0 which they may he ra= dially adjusted, the cutters being radially movable relatively to said independent Support, and in sliding Contact therewith.

In testimony whereof I have affixed my signature, in presence of two witnesses.

RALPH W. BAILEY.

IVit-nesses C. F. BROWN, I. W. PEZZETTI. 

